Converting a cement mixer to a sand pumping truck a closurer plate

ABSTRACT

A plate-mounted assembly containing a suction connection, unloading hatches and level inspection windows, converts a cement mixer truck to a sand pumper truck.

United States Patent Bohannon Apr. 2, 1974 CONVERTING A CEMENT MIXER TOA [56] References Cited SAND PUMPING TRUCK A CLOSURER UNITED STATESPATENTS PLATE 2,795,349 6/1957 Cawood 220/31 R 7 Inventor; i Bohannon,905 Fredric Ave 2,567,540 9/1951 Bergstrom et a]. 220/35 X Sacramento,Calif. 95826 Primary Examiner-George T. Hall [22] Filed: Aug. 10, 197221 Appl. No.1 279,721 ABSTRACT A plate-mounted assembly containing asuction con- [52] U 8 Cl 220/31 R 220/35 nection, unloading batches andlevel inspection win- [51] B65d 51/10 dows, converts a cement mixertruck to a sand [58] Field of Search 220/31 R, 29, 35 Pumper truck 1Claim, 1 Drawing Figure CONVERTING A CEMENT MIXER TO A SAND PUMPINGTRUCK A CLOSURER PLATE This invention relates to construction equipment,and more particularly to cement mixers and sand pumpers.

A principal object of this invention is to provide a device attachableto a cement mixer, having a sand pumping connection and unloadinghatches, thereby converting the cement mixer to a sand pumping truck,such conversion is suited to use at car washes, sand pits and stormdrains. The conversion kit operates with a vacuum pump for pumping sandup into the tank from which the sand is then pumped out of one or morehatches.

Other objects of this invention are to provide a kit for converting acement mixer to a sand pumping truck which is simple in design,inexpensive to manufacture, rugged in construction, easy to use andefficient in operation.

These and other objects will be readily evident upon a study of thefollowing specification and the accompanying drawing wherein:

The FIGURE shows a conversion kit comprising a plate 11 attachable to acement mixer, not shown, by bolts 12.

Plate 11 has a centrally disposed flange and seal 13 for connection to astationary core 14, shown in section. Core 14 connects to a sand pump,not shown, that delivers sand up through flange 13 and into the tank.

Plate 11 is fitted with a pair of hatch doors 15 each door 15 extendsout on a pair of arms 16 to a pair of bearings 17. A handle 18 alsoserves to seal doors 15 by engagement with a latch 19. A spring 20 ondoor 15 is for quick wide opening when handle 18 is moved clear of latch19.

Depth indication of tank fill is available at one or more windows 21.

For unloading sand the mixer is rotated degrees from the position seenin the FIGURE and a batch is then opened. This kit also simplifiesgetting wet sand out of the tank without resort to a high pressure hose.

What I now claim is:

1. A kit for connecting a cement mixer to a sand pumper comprising aplate attachable to said cement mixer upon which are mounted a sand pumpconnecting flange and seal, a pair of diametrically opposed hatch doorssecured by a latching handle, said doors pivoted on hinges and providedwith springs which open said doors to a wide position when released atsaid latches, said plate having one or more level inspection windows.

l i i

1. A kit for connecting a cement mixer to a sand pumper comprising aplate attachable to said cement mixer upon which are mounted a sand pumpconnecting flange and seal, a pair of diametrically opposed hatch doorssecured by a latching handle, said doors pivoted on hinges and providedwith springs which open said doors to a wide position when released atsaid latches, said plate having one or more level inspection windows.